August 7th, 2020 Options Expiration -- Micron Technology Inc. Covered Calls Position Assigned

The August 7th, 2020 $48.00 Covered Calls position in Micron Technology Inc. (ticker MU) expired in-the-money, so the 500 shares of Micron stock were assigned (i.e. sold) at the $48.00 strike price.  As detailed below, the return-on-investment (ROI) result was  +2.1% absolute return (equivalent to +50.7% annualized return-on-investment for the 15 days holding period).

Micron Technology Inc. (MU) -- Closed Covered Calls Position by Assignment at Expiration

The Buy/Write transaction was as follows:
07/24/2020 Bought 500 shares of Micron Technology Inc. stock @ $49.93 per share 
07/24/2020 Sold 5 Micron Aug 7th, 2020 $48.00 Call options @ $2.91 per share
Note 1: The Implied Volatility of the Call options was 44.5.
Note 2: The Open Interest was only 81 contracts, but the bid/ask spread when the position was executed was narrow at only $.05 ($2.90/$2.95). 
08/07/2020 Five Micron $48.00 Call options expired in-the-money, so 500 MU shares sold at $48.00 strike price. Note: the MU share price closed in-the-money at $48.75.

The overall performance results (including commissions) was as follows:
Covered Call Cost Basis: $23,513.35
= ($49.93 - $2.91) * 500 shares + $3.35 commission

Net Profit Components:
(a) Options Income: +$1,455.00
= ($2.91 * 500 shares)
(b) Dividend Income: +$0.00 
(c) Capital Appreciation (Micron stock was above $48.00 strike price at August 7th expiration): -$965.00
= ($48.00 - $49.93) * 300 shares

Total Net Profit: +$490.00
= (+$1,455.00 options income +$0.00 dividend income -$965.00 capital appreciation)

Absolute Return: +2.1%
= +$490.00/$23,513.35
Equivalent Annualized Return: +50.7%
= (+$490.00/$23,513.35)*(365/15 days)